He was also convicted of first-degree criminal damage to property in 2005 after getting into the Sports and Health Center at the University of Minnesota Duluth on several occasions and damaging exercise balls. He also admitted at the time to slicing into exercise balls at the SMDC Center for Personal Fitness, the Polinsky Medical Rehabilitation Center and St. Luke’s hospital, according to criminal complaints.
"Duluth 'ball slasher' arrested again"]]>

In 2009, Bjerkness was convicted of third-degree burglary after he admitted breaking into the SMDC-Duluth Clinic West building and slashing balls there.

He was also convicted of first-degree criminal damage to property in 2005 after getting into the Sports and Health Center at the University of Minnesota Duluth on several occasions and damaging exercise balls. He also admitted at the time to slicing into exercise balls at the SMDC Center for Personal Fitness, the Polinsky Medical Rehabilitation Center and St. Luke’s hospital, according to criminal complaints.
"Duluth 'ball slasher' arrested again"]]>